Understanding EPC Assessments: What to Expect

By Ian on Tuesday 14th November 2023

Wind turbine to reduce energy usage

Share this article

If you are selling or renting a house in the UK. You’ll need an Energy Performance Certificate (EPC). To get an EPC, a qualified assessor needs to complete a brief inspection of the property. You’ve booked your EPC, but what does the EPC assessor do during the inspection. We’ll look at all the areas the assessment will cover and what you need to do to prepare.

Table of Contents

Booking an EPC Assessment

Step one is booking an EPC. If you’re in the North West, give us a call on 01925 699 321 and we’ll arrange an appointment that’s convenient for you. Alternatively, you can find your local EPC assessor using the government’s EPC assessor register.

EPC Assessment

When your EPC assessor arrives, they’ll complete a quick survey of your property. Usually the first task is getting a good understanding of the layout of your home and sketching a rough floor plan. They’ll measure the dimensions and make notes about things such as radiators, light bulbs and window types.

Next, they’ll need to take a more in depth look at your home. When we complete an EPC assessment this is a list of things that we look at:

  • External wall thickness and check for insulation
  • Floor types and check for insulation
  • Loft insulation type and thickness
  • Heating systems like boilers, electric radiators and fires.
  • How the heating is controlled. i.e. Thermostat, programmer, TRVs
  • Hot water systems such as immersion cylinders.
  • Renewable systems like solar panels or solar water heating.

With this information your EPC assessor can input into software called RDSAP (Reduced Data Standard Assessment Procedure) and generate an EPC certificate. Take note, your assessor will need to see all these things and gather evidence. They cannot take a home owners word, for example, that the loft has 270mm of loft insulation. They’ll need to see, measure and photograph it themselves.

The EPC assessment will take 30-45 minutes to complete from start to finish in most cases.

How to Prepare for an EPC

Information is the most important way a home owner can prepare for an EPC. If you’ve had an extension added to your home, having planning permission or building control sign off can help the assessor accurately date the construction. Have you had energy saving upgrades added to your home like cavity wall insulation or new double glazing? If you have the specification to hand this can only improve your EPC rating.

Additionally, making sure that your EPC assessor can access every area of your home is necessary. We’ll need to pop our heads in every room including loft spaces and basements. We’ll need to see boilers, cylinders and meters too. Making sure that any cupboards containing these services are empty is really helpful.

Finding Your New EPC Certificate

Once the EPC survey is complete, your assessor will update the central register with you new certificate. In most cases this is done before the assessor leaves your home. On the rare occasion, it can take a little longer. You’ll be able to find your certificate on the central register of EPCs.

Your new EPC will be valid for ten years!

Ready to get your new EPC Certificate? Give us a call on 01925 699 321 and we’ll book your assessment at a time that suits you.

About the Author

About Ian Kay

Ian is a seasoned energy assessor helping his customers, reduce energy usage and save money on their bills. He holds qualifications from both City & Guilds and ABBE for Domestic EPCs and Commercial EPCs (Level 3 NDEA and Level 4 NDEA). With a background in the building trade he can provide his customers with a unique perspective and advice. Ian combines his deep industry knowledge with practical advice to create blog posts that help visitors understand the complexities of energy performance certificates and reducing operating costs. When not immersed in the world of energy assessments, Ian enjoys exploring the great outdoors and spending quality time with his family.

Read more about Ian

Find Ian on LinkedIn